Modvat credit limitation cannot be implied retrospectively; differential credit allowed where no statutory time bar existed.

Rule 57G could not be read as imposing a six-month limit for availing Modvat credit for the relevant period because that limitation was inserted only prospectively on 29-6-1995. In the absence of any statutory time bar during the disputed period, the Tribunal could not import a limitation by interpretation, and the later amendment did not govern earlier transactions. The dealer was therefore entitled to claim the differential Modvat credit later when the shortfall was discovered, and the claim could not be rejected merely because it was made after the original credit entry.

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Issues: (i) Whether the Tribunal was in importing a six-month limitation into Rule 57G for availing Modvat credit for the relevant period; (ii) whether the dealer was entitled to avail the differential Modvat credit at a later date in the absence of any statutory limitation.

Issue (i): Whether the Tribunal was in importing a six-month limitation into Rule 57G for availing Modvat credit for the relevant period?

Analysis: Rule 57G prescribing a six-month limit was inserted only on 29-6-1995 and operated prospectively. For the period in dispute, no statutory provision prescribed any limitation for taking Modvat credit. A limitation period cannot be introduced by judicial interpretation where the rule-making authority had not enacted one. The later amendment could not govern the earlier period.

Conclusion: The imported six-month limitation was unsustainable and the issue was decided against the Revenue and in favour of the assessee.

Issue (ii): Whether the dealer was entitled to avail the differential Modvat credit at a later date in the absence of any statutory limitation?

Analysis: Since the relevant transactions occurred before the prospective amendment and no limitation then existed, the dealer could avail the shortfall in credit when the mistake was discovered. The credit related to additional duty of customs shown in the Bills of Entry, and the later claim could not be rejected merely because it was taken after the original credit entry.

Conclusion: The dealer was entitled to the differential credit, and the issue was decided in favour of the assessee and against the Revenue.

Final Conclusion: The reference was answered by holding that no six-month bar applied to the relevant period and that the dealer's claim to the differential Modvat credit succeeded.

Ratio Decidendi: A period of limitation for availing credit must be specifically provided by statute or rule and cannot be imported by implication for a period governed by an earlier regime in which no such limitation existed.

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